Exam 22: Viruses, Viroids, and Prions: Infectious Biological Particles

Viral infections in plants are spread from cell to cell via plasmodesmata.

Viral genomes are difficult to sequence.

Which of these statements describes the latent phase of an animal virus?

In which major family of animal viruses is the virus that causes AIDS found?

What adaptation helped the strain of influenza responsible for the pandemic of 1918 to be such an effective infectious agent?

Which of these terms best describes the biological nature of a virus?

Figure 22-1 -Which of these terms best describes the shape of the virus in Figure 22-1?

Figure 22-1 -In Figure 22-1, which number identifies the coat?

Creutzfeldt-Jakob disease (CJD) is a fatal prion infection in humans.

Which prion disease affects sheep?

What is the viral DNA that is integrated into a bacterial host chromosome called?

Polio virus is often used in genetic research.

What is the function of reverse transcriptase?

Viroids consist of only RNA molecules.

Some viruses can cause cancer.

Figure 22-1 -In Figure 22-1, which number identifies the structure that enters the host cell?

Figure 22-1 -In Figure 22-1, which virus is illustrated?

BSE is caused by an infections protein molecule.